import java.util.concurrent.atomic.AtomicInteger;

public class Demo1 {
    private static AtomicInteger count = new AtomicInteger(0);

    public static void main(String[] args) throws InterruptedException {

        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                count.getAndIncrement();
            }
        });

        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                count.getAndIncrement();
            }
        });

        t1.start();
        t2.start();
        t1.join();
        t2.join();

        System.out.println("count = " + count.get());

        int account = 0;
        int version = 1;

        int oldVersion = version;

        if(CAS(version, oldVersion, oldVersion + 1)) {
            account += 500;
        }
    }

    public static boolean CAS(int a, int b, int c) {return true;}
}
